A rich, earthy red made from 100% natural red clay soil composed of minerals and iron oxides. Formulated with PR101 (Synthetic Red Iron Oxide), Herculane Red offers excellent lightfastness and a semi-opaque finish. This fast-drying, non-toxic inorganic pigment is known for its stability, warmth, and suitability for underpainting or tonal foundations. Low in oil content with average tinting strength, it’s a dependable classic for serious painters.